package com.zhu.blog.controller.admin;


import com.zhu.blog.model.Tag;
import com.zhu.blog.service.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TagController {

    @Autowired
    private TagService tagService;


    //分页
    @GetMapping("/tags")
    public String tags(@PageableDefault(size = 5,sort = {"id"},direction = Sort.Direction.DESC)
                                   Pageable pageable, Model model){
        model.addAttribute("page",tagService.listTag(pageable));
        return "admin/tags";
    }

    //返回增加页面
    @GetMapping("/tags/input")
    public String addTags(Model model){
        model.addAttribute("tag",new Tag());
        return "admin/tags-input";
    }

    //增加标签
    @PostMapping("/tags")
    public String postTag(@Valid Tag tag, BindingResult result, RedirectAttributes attributes){
        Tag tagByName = tagService.getTagByName(tag.getName());
        if(tagByName != null){
            result.rejectValue("name","nameError","该标签已存在，不能添加重复的分类标签");
        }
        if(result.hasErrors()){
            return "admin/tags-input";
        }
        Tag t = tagService.saveTag(tag);
        if(t == null){
            attributes.addFlashAttribute("message","添加失败!");
        }else {
            attributes.addFlashAttribute("message","添加成功!");
        }
        return "redirect:/admin/tags";
    }

    //获取要修改标签的id
    @GetMapping("/tags/{id}/input")
    public String editTagId(@PathVariable Long id,Model model){
        model.addAttribute("tag",tagService.getTag(id));
        return "admin/tags-input";
    }

    //修改标签
    @PostMapping("/tags/{id}")
    public String editTag(@Valid Tag tag, BindingResult result,@PathVariable Long id,
                          RedirectAttributes attributes){
        Tag tagByName = tagService.getTagByName(tag.getName());
        if(tagByName != null){
            result.rejectValue("name","nameError","该标签已存在，不能添加重复的分类标签");
        }
        if(result.hasErrors()){
            return "admin/tags-input";
        }
        Tag t = tagService.updateTag(id, tag);
        if(t == null){
            attributes.addFlashAttribute("message","修改失败!");
        }else {
            attributes.addFlashAttribute("message","修改成功!");
        }
        return "redirect:/admin/tags";

    }

    //删除标签
    @GetMapping("/tags/{id}/delete")
    public String deleteTag(@PathVariable Long id,RedirectAttributes attributes){
        tagService.deleteTag(id);
        attributes.addFlashAttribute("message","删除成功");
        return "redirect:/admin/tags";

    }

}
